Preemergence herbicides can aid in the control of troublesome weeds such as waterhemp and giant ragweed. They can also result in lower weed densities and a more uniform weed height at the time of postemergence herbicide application, aid in the management of herbicide-resistant weeds, and ultimately help protect crop yield potential and profitability.

When No-Till Farmer (NTF) got its start in 1972, its pages were filled with tips on how to make herbicides like paraquat, atrazine, 2,4-D, Princep and Banvel (an early dicamba formulation) work in no-till systems. In Part 1 of this series, we’ll look at the most important early herbicides for no-tillers.

Water quality regulations in the 1990s led to a surprise increase of herbicides in waterways, despite decreased use of the target chemical. Turns out drainage tile — so useful in no-till fields — is speeding the compounds from field to stream.

Opposing chemical trends are linked to atrazine regulations from the 1990, say scientists with the United States Geological Survey.

ImpactZ herbicide is registered for use in field corn, seed corn, popcorn and sweetcorn, with no restrictions on soil type, tank mix partners or insecticides. ImpactZ herbicide contains both Impact and Atrazine for control of grass and broadleaf weeds in corn.